US8098240B2 - Capacitive touchpad and toy incorporating the same - Google Patents

Capacitive touchpad and toy incorporating the same Download PDF

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Publication number
US8098240B2
US8098240B2 US12/464,614 US46461409A US8098240B2 US 8098240 B2 US8098240 B2 US 8098240B2 US 46461409 A US46461409 A US 46461409A US 8098240 B2 US8098240 B2 US 8098240B2
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United States
Prior art keywords
touch surface
capacitive touch
capacitive
voltage
touchpad
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Expired - Fee Related, expires
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US12/464,614
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US20090318229A1 (en
Inventor
James Zielinski
Charles H. De Voe
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Mattel Inc
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Mattel Inc
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Priority to US12/464,614 priority Critical patent/US8098240B2/en
Assigned to MATTEL, INC. reassignment MATTEL, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ZIELINSKI, JAMES, DEVOE, CHARLES H
Publication of US20090318229A1 publication Critical patent/US20090318229A1/en
Priority to US13/324,857 priority patent/US8400426B2/en
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F3/00—Board games; Raffle games
    • A63F3/00643—Electric board games; Electric features of board games
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F9/00—Games not otherwise provided for
    • A63F9/24—Electric games; Games using electronic circuits not otherwise provided for
    • A63F2009/2401—Detail of input, input devices
    • A63F2009/2402—Input by manual operation
    • A63F2009/2408—Touch-sensitive buttons
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F9/00—Games not otherwise provided for
    • A63F9/24—Electric games; Games using electronic circuits not otherwise provided for
    • A63F2009/2448—Output devices
    • A63F2009/245—Output devices visual
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F9/00—Games not otherwise provided for
    • A63F9/24—Electric games; Games using electronic circuits not otherwise provided for
    • A63F2009/2483—Other characteristics
    • A63F2009/2485—Other characteristics using a general-purpose personal computer
    • A63F2009/2486—Other characteristics using a general-purpose personal computer the computer being an accessory to a board game
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F2300/00—Features of games using an electronically generated display having two or more dimensions, e.g. on a television screen, showing representations related to the game
    • A63F2300/10—Features of games using an electronically generated display having two or more dimensions, e.g. on a television screen, showing representations related to the game characterized by input arrangements for converting player-generated signals into game device control signals
    • A63F2300/1068—Features of games using an electronically generated display having two or more dimensions, e.g. on a television screen, showing representations related to the game characterized by input arrangements for converting player-generated signals into game device control signals being specially adapted to detect the point of contact of the player on a surface, e.g. floor mat, touch pad

Definitions

  • the present disclosure relates to capacitive touchpad assemblies, as well as computer peripheral devices resembling toys and having components such as input capacitive touchpad assemblies and integral card readers.
  • the touchpads may use capacitive sensors, and haptic feedback may be provided with a piezoelectric device.
  • limited gesture recognition may be used to improve play value.
  • Examples of capacitive sensors are disclosed in U.S. Pat. Nos. 4,039,940, 4,272,916, 4,355,300, 4,595,913, 5,413,518, 5,650,597, 6,661,239, 6,834,251, 6,940,291 and Publication No. US20040219501.
  • Examples of piezoelectric devices are disclosed in U.S. Pat. Nos. 4,334,280, 6,429,846 and 6,466,036.
  • Examples of gesture recognition are disclosed in United States Patent Publication Nos. US20060205502, US20060089197, and US20060252494.
  • Examples of card readers are disclosed in U.S. Pat. Nos. 4,884,974, 5,334,022, 7,224,934, 7,387,560.
  • the disclosures of all the above-referenced patents and publications are incorporated herein by reference.
  • Capacitive touchpad assemblies toys including capacitive touchpad assemblies and, in some cases, integral card readers, and methods for detecting contact with a capacitive touch surface are provided.
  • a capacitive touch surface's capacitance may vary depending on whether an object such as a human finger is in contact with the surface.
  • a voltage of the capacitive touch surface may be altered during each of a predetermined number of recurring intervals.
  • the capacitance of the capacitive touch surface will determine the amount of time required to alter its voltage to a threshold voltage within each interval. The sum amount of time required for the voltage of the capacitive touch surface to reach the threshold voltage in a predetermined number of intervals may be used to determine whether the capacitive touch surface is being touched during that predetermined number of intervals.
  • FIG. 1 depicts a toy according to the present disclosure attached to a computer, according to one embodiment of the disclosure.
  • FIG. 2 is a front view of a toy including a capacitive touchpad assembly with a plurality of capacitive touch surfaces, according to one embodiment of the disclosure.
  • FIG. 3 depicts an example logic circuit for implementing one or more of the embodiments disclosed herein.
  • FIG. 4 is a front view of a toy similar to that shown in FIG. 2 with a playing card overlaying the plurality of capacitive touch surfaces, according to one embodiment of the disclosure.
  • FIG. 5 is a side view of a toy similar to those shown in FIGS. 1-4 , according to one embodiment of the disclosure.
  • FIGS. 6 and 7 are front and rear views, respectively, of an example playing card usable with devices such as those shown in FIGS. 1-5 , according to one embodiment of the disclosure.
  • FIG. 8 depicts example circuit logic for detecting whether a capacitive touch surface is being touched, according to one embodiment of the disclosure.
  • FIG. 9 depicts two charts showing the differences in capacitance as a function of time between a capacitive touch surface being touched and not being touched, in a capacitive touchpad assembly incorporating the circuit logic of FIG. 8 .
  • FIG. 10 depicts alternative circuit logic for detecting whether a capacitive touch surface is being touched, according to one embodiment of the disclosure.
  • FIG. 11 depicts two charts showing the differences in capacitance as a function of time between a capacitive touch surface being touched and not being touched, in a capacitive touchpad assembly incorporating the circuit logic of FIG. 10 .
  • FIG. 1 a computing device 10 including a keyboard 12 and a monitor 14 displaying an image 16 .
  • Computing device 10 also may include any number of other components that are not shown, such as a mouse, a printer, and the like.
  • a peripheral toy 20 may be operably coupled to computing device 10 via an interface 22 .
  • Interface 22 may be a wired (e.g., USB or Serial) or wireless (e.g., BlueTooth, RFID, Infrared) connection.
  • peripheral toy 20 may include a housing 24 with an integral card reader 26 and a surface 28 adapted to receive one or more portable playing cards 30 (see FIGS. 1 , 3 and 5 - 6 ).
  • FIG. 3 depicts an example logic circuit that may be implemented in peripheral toys 20 such as those shown in FIGS. 1 and 2 .
  • Integral card reader 26 is shown here as a series of optical pickups.
  • Peripheral toy 20 may also include a CPU 29 , also referred to as a controller, which may be configured to control the interaction of various components of peripheral toy 20 . Additional components will be described further below.
  • a user may install one or more portable playing cards 30 onto surface 28 of peripheral toy 20 .
  • Integral card reader 26 may read indicia 32 on a surface of playing card 30 (e.g., on the back of playing card 30 , as seen in FIG. 6 ) to obtain identification information about playing card 30 .
  • CPU 29 may be configured to receive from integral card reader 26 the playing card identification information and to communicate instructions through interface 22 to computing device 10 to provide an output related to the received identification information.
  • identification information about playing card 30 may include information relating to a character 34 depicted on card 30 . Placing playing card 30 on surface 28 may cause CPU 29 to instruct computing device 10 to output image 16 (see FIG. 1 ) appearing similar or being related to the character 34 on computer monitor 14 . A user may control image 16 on monitor 14 with peripheral toy 20 by manipulating controls on peripheral toy 20 to cause CPU 29 to send control signals to computing device 10 via interface 22 .
  • each sensor of integral card reader 26 is configured to optically read a single portion of indicia 32 on card 30 to ascertain information about card 30 .
  • the example integral card reader 26 shown in FIGS. 2 and 3 includes five sensors representing five binary digits, allowing for 31 permutations or discrete card identities. While the least significant bit in FIG. 2 is shown on the right, this is not intended to be limiting, and it should be understood that the sensors in integral card reader 26 may be in any order.
  • FIGS. 6 and 7 depict the front and back, respectively, of an example playing card 30 compatible with the toy 20 shown in FIGS. 1-5 .
  • Indicia 32 are seen in FIG. 7 on the back of card 30 comprising five individual value indicators.
  • Each value indicator may be adapted to be read by a single sensor of integral card reader 26 .
  • Each value indicator may be capable of communicating one or more pieces of information.
  • the most significant bit of indicia 32 is arranged oppositely relative to the most significant bit of the integral card reader 26 so that the most significant bits will line up when the back of card 30 is faced towards integral card reader 26 .
  • peripheral toy 20 may include additional features, such as a camera 36 , camera control buttons 37 , other input controls 38 , and a four-way directional pad 39 .
  • camera 36 includes an image sensor and lens, allowing photographs to be taken.
  • camera 36 may be a simulation only, but camera control buttons 37 may be used to trigger the display of simulated photographs on computing device 10 .
  • Four-way directional pad 39 may be similar to that described in U.S. Pat. No. 4,687,200, the disclosure of which is incorporated herein by reference for all purposes.
  • peripheral toy 20 may include controls such as a capacitive touchpad assembly 40 comprising one or more capacitive touchpads/touch surfaces 42 disposed on housing 24 of peripheral toy 20 , often on surface 28 .
  • each capacitive touch surface 42 is covered by a decorative dielectric material.
  • Contacting a capacitive touch surface 42 with an object such as a human finger modifies the effective capacitance of the capacitive touch surface 42 .
  • This modification of capacitance, and hence whether a capacitive touch surface 42 is being touched may be detected by altering a voltage of the capacitive touch surface 42 and measuring the amount of time required for the capacitive touch surface 42 to reach a threshold voltage.
  • Playing card 30 may be constructed of materials chosen so that placement of card 30 on surface 28 will not interfere with the operation of capacitive touchpad assembly 40 .
  • capacitive touch surface 42 may be configured to detect touching through playing card 30 .
  • Card 30 also may be usable to improve the usability of capacitive touchpad assembly 40 .
  • card 30 may include one or more control area indicators 35 that indicate a particular portion of card 30 that will overlay a particular capacitive touch surface 42 .
  • the underlying capacitive touch surface 42 may cause computing device 10 to alter output image 16 in a manner that is related to what is depicted in the particular control area indicator 35 .
  • card 30 includes control area indicator 35 depicting clothing.
  • CPU 29 may be configured to alter the clothing of character output 16 when the capacitive touch surface 42 underlying this control area indicator 35 is touched.
  • FIG. 8 illustrates example circuit logic for monitoring the capacitance of capacitive touch surface 42 , and hence whether capacitive touch surface 42 is being touched Repeatedly, capacitive touch surface 42 is charged at least until its voltage reaches a predetermined threshold value, and the time required to reach the predetermined charge threshold in each instance is measured.
  • Capacitive touch surface 42 is connected to a power source Vcc.
  • a pulse generator or clock 44 generates pulses, and in many cases timing pulses, to a logic-controlled switch 46 to define recurring intervals. The pulses are also provided to a timer 48 .
  • Logic-controlled switch 46 may be a microchip, an ASIC or other similar circuitry, and may be configured to open and close a connection between capacitive touch surface 42 and ground 50 to alter a voltage of capacitive touch surface 42 .
  • connection to ground 50 discharges capacitive touch surface 42 quickly, particularly where little to no resistance exists between capacitive touch surface 42 and ground 50 .
  • a resistor may be included between capacitive touch surface 42 and ground 50 to cause the discharge of capacitive touch surface 42 to be more gradual.
  • a peak level detector 52 is coupled to capacitive touch surface 42 and is configured to detect, and indicate to timer 48 , when the voltage of capacitive touch surface 42 reaches the threshold voltage (indicated by dotted line A in FIG. 9 ). Accordingly, timer 48 may be configured to capture or measure the time required to charge capacitive touch surface 42 to the threshold voltage. Timer 48 may be started based on output from pulse generator 44 (e.g., at the beginning of each interval T, which typically would be a time interval) and stopped at the instruction of peak level detector 52 (i.e., when the threshold voltage is reached). When timer 48 stops, it may store the measured time in a register 54 , and the measured time may be added to a sum of captured times contained in an accumulator 56 .
  • Timer 48 may measure times during a predetermined number of intervals, or in other words, during a sample.
  • a cycle counter 58 may track intervals in order to control sample size. For example, if a sample size is to be X intervals T, cycle counter 58 increments X times, during which time accumulator 56 accumulates X measured charge times from timer 48 . Once X cycles pass, the sample is complete.
  • the sum value in accumulator 56 may be stored and accumulator 56 may be reset to zero.
  • the sum value from accumulator 56 then may be compared to a predetermined value or threshold Y. If it is above (or in some cases, greater than or equal to) the threshold Y, then it may be determined in Path A that capacitive touch surface 42 was being touched during the sample. If the stored accumulator value is below the threshold Y, then it may be determined in Path B that capacitive touch surface 42 was not being touched during the sample.
  • Example results of the circuit logic shown in FIG. 8 are depicted graphically in FIG. 9 .
  • a sample where capacitive touch surface 42 is being touched is shown in the top graph labeled “TOUCH.” Because capacitive touch surface 42 is being touched, its capacitance is higher. Accordingly, more of an interval, e.g., 2 ⁇ 3 of an interval T, may be required to charge capacitive touch surface 42 to the threshold voltage indicated by dotted line A.
  • capacitive touch surface 42 is not being touched is shown in the bottom graph of FIG. 9 labeled “NO TOUCH.” Because the capacitance of capacitive touch surface 42 is lower when it is not being touched, less of an interval, e.g., only 1 ⁇ 3 of an interval T, may be required to charge capacitive touch surface 42 to the threshold voltage indicated by dotted line A.
  • capacitive touch surface 42 may cease and capacitive touch surface 42 may be connected to ground 50 to discharge its voltage, immediately prior to its being charged again. This creates a break in time between the charges of capacitive touch surface 42 that makes a sample readily observable using an oscilloscope. This also makes the determination of whether capacitive touch surface 42 is being touched entirely independent of any frequency of a signal, as the recurring intervals from clock 44 assure a constant frequency.
  • FIG. 10 Alternative circuit logic is depicted in FIG. 10 .
  • This embodiment is similar to the one shown in FIG. 8 except that instead of measuring the time required to charge capacitive touch surface 42 to a threshold voltage, this embodiment measures the time required to discharge capacitive touch surface 42 to a threshold voltage.
  • timer 48 is set to zero and logic-controlled switch 46 connects capacitive touch surface 42 to a power supply Vcc for either a predetermined amount of time or until a predetermined charge (labeled B in FIG. 11 ) is reached.
  • logic-controlled switch 46 disconnects capacitive touch surface 42 from the power supply Vcc so that the voltage of capacitive touch plate 42 is gradually discharged through a discharge resistor.
  • a zero level detector 60 is connected to capacitive touch surface 42 to detect when the voltage of the capacitive touch surface 42 drops to zero. Once this happens, zero level detector 60 instructs timer 48 to stop. Accordingly, the time measured by timer 48 is the time required to charge capacitive touch surface 42 , plus the time required to discharge the voltage of capacitive touch surface 42 to zero. As was the case above, the sum of the measured times for a sample are accumulated in accumulator 56 . The remaining logic may be identical to that shown in FIG. 8 . Although a zero level detector 60 is shown in FIG. 10 , indicating a predetermined threshold value of zero, it should be understood that other non-zero predetermined threshold values may also be selected.
  • Example results of the logic circuit shown in FIG. 10 are depicted graphically in FIG. 11 .
  • a sample where a capacitive touch surface 42 is being touched is shown in the top graph of FIG. 11 labeled “TOUCH.” Because capacitive touch surface 42 is being touched, its capacitance is higher, which means more time is required for it to discharge. In this case, 1 ⁇ 2 of an interval T is required to discharge capacitive touch surface 42 to zero.
  • the bottom graph of FIG. 11 labeled “NO TOUCH” capacitive touch surface 42 is not being touched, making its capacitance lower and decreasing the time required for it to discharge. In this case, 1 ⁇ 4 of an interval T is required to discharge capacitive touch surface 42 to zero.
  • a signal communicated from peripheral toy 20 to computing device 10 via interface 22 may utilize one or more communication or electronic protocols.
  • actions taken using capacitive touchpad assembly 40 or other controls on peripheral toy 20 may be transmitted to computing device 10 in a format such as USB.
  • software executing on computing device 10 may be operated even without toy 20 (where toy 20 is lost or damaged) using another USB input device.
  • the following list contains an example set of USB keystrokes that may be mapped to various capacitive touchpads on toy 20 .

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  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
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US12/464,614 2008-06-20 2009-05-12 Capacitive touchpad and toy incorporating the same Expired - Fee Related US8098240B2 (en)

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US12/464,614 US8098240B2 (en) 2008-06-20 2009-05-12 Capacitive touchpad and toy incorporating the same
US13/324,857 US8400426B2 (en) 2008-06-20 2011-12-13 Capacitive touchpad and toy incorporating the same

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US7455408P 2008-06-20 2008-06-20
US8339508P 2008-07-24 2008-07-24
US12/464,614 US8098240B2 (en) 2008-06-20 2009-05-12 Capacitive touchpad and toy incorporating the same

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CA (1) CA2728410C (fr)
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USD945535S1 (en) 2019-01-07 2022-03-08 Kids Ii Hape Joint Venture Limited Children's play table
USD954851S1 (en) 2019-11-25 2022-06-14 Kids Ii Hape Joint Venture Limited Toy keyboard
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CN102124429B (zh) 2015-06-24
US8400426B2 (en) 2013-03-19
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US20090318229A1 (en) 2009-12-24

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